Eighteen Sound 21LW1400

Eighteen Sound 21LW1400
General Specifications Datasheet
Brand Eighteen Sound
Reference 21LW1400
Manufacturer website www.eighteensound.com
Size 21 in
533 mm
Type Extended Low Frequency
Impedance Z 8 Ω
Minimum impedance Zmin 6.4 Ω
Nominal Power P 1400 W
Program Power Pmax 1600 W
Sensitivity SPL 99 dB
Usable frequency range 24 - 2000 Hz
Recommended crossover 250 Hz
Eighteen Sound 21LW1400 Frequency response
Eighteen Sound 21LW1400 Impedance
Thiele/Small parameters Values in gray are calculated.
Resonant frequency Fs 28 Hz
Surface area of cone Sd 1662 cm²
DC resistance Re 5 Ω
Mechanical Q Qms 9.32
Electromagnetic Q Qes 0.24
Total Q factor Qts 0.24
Mechanical suspension compliance Cms 98 µm/N
Compliance equivalent air volume Vas 385 liters
Moving mass Mmd 256.93 g
Moving mass (including airload) Mms 296 g
Mechanical resistance Rms 5.59 N·s/m
BL product BL 33.5 T·m
Voice coil inductance Le 2.85 mH
Maximum linear excursion (one way) Xmax 9.5 mm
Maximum mechanical limit (one way) Xlim 26 mm
Efficiency η₀ 3.98 %
Efficiency bandwidth product EBP 115
Effective diaphragm diameter Ø 46 cm
Import this driver in a simulation software:
WinISD 18Sound 21LW1400.wdr
Hornresp 18Sound 21LW1400.txt
Basta! 18Sound 21LW1400.bastaelement
Eighteen Sound 21LW1400 Dimensions
Dimensions
Overall diameter 545.0 mm
Baffle hole diameter 490.0 mm
Overall depth 259 mm
Flange thickness 14 mm
Net weight 17 kg
Materials of construction
Diaphragm material Carbon Fiber reinforced Paper
Diaphragm shape Straight
Surround material Polycotton
Voice Coil Parameters
Voice coil diameter 100 mm
Coil material Copper
Similar drivers Power
(W)
SPL
(dB)
Fs
(Hz)
Sd
(cm²)
Qms
Qes
Vas
(L)
Xmax
(mm)
Eighteen Sound 21LW1400 1400 99 28 1662 9.32 0.24 385 9.5
Beyma 21PW1400Fe 1400 99 30 1734 7.40 0.36 402 10.0
Celestion NTR21-5010JD 1600 98 30 1663 5.23 0.31 341 9.0
B&C Speaker 21DS115 8Ω 1700 99 30 1680 10.00 0.24 269 15.0
B&C Speaker 21DS115 4Ω 1700 99 30 1680 11.00 0.20 274 15.0
Precision Devices PD.2150 1000 98 30 1698 14.21 0.28 309 10.5
B&C Speaker 21SW115 8Ω 1700 97 30 1680 10.90 0.39 318 14.0
Eighteen Sound 18ND9300 1000 98 30 1220 7.86 0.29 316 9.5
SICA 21 S 4 PL 1200 99 35 1662 9.95 0.31 255 5.2
Beyma 18PW1400Fe 1400 98 32 1255 10.23 0.28 229 10.0
FaitalPRO 18FH500 8Ω 1200 99 30 1134 12.50 0.36 375 9.3

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